(x+1) + (x+2) + (x+3) + (x+4) = 26
<=> 4x + 10 = 26
<=> 4x = 16
<=> x = 4
Vậy x=4
(x+1 ) +(x+2) +(x+3) +(x+4) =26
4x + (1+2+3+4) = 26
4x + 10 = 26
4x = 16
x = 4
( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 26
( x + x + x + x ) + ( 1 + 2 + 3 + 4 ) = 26
4x + 10 = 26
4x = 26 - 10
4x = 16
x = 16 : 4
x = 4
( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 26
4.x + ( 1 + 2 + 3 + 4 ) = 26
4.x + 10 = 26
4.x = 26 - 10
4.x = 16
x = 16 : 4
x = 4
Nho k cho mk nha ban !!!
